Figure 2-34 Changes to waste treatment costs

Source: Ministry of the Environment

### B. Changes to the processing situation of night soil and septic tank sludge

In fiscal 2006, from the total of 26.11 million kiloliters night soil and individual wastewater treatment facility sludge, 97.2 % or 25.39 million kiloliters were processed at human-waste treatment plants or by discharge into sewage

### 3. Industrial wastes

(1) Status of the generation and disposal of industrial wastes

### A. Changes to the exhaust amount of industrial wastes

The figures for industrial wastes generated since fiscal 1990, have stayed more or less constant at around 400 million tons, with no major yearly differences (Figure 2-36).

### B. Changes to the number of intermediate processing facilities of industrial wastes

Intermediate processing facilities carry out incineration, breakup or dehydrate industrial wastes, there number decreased slightly on the previous year by 1.2% to a total of 18,935 licensed facilities for all of Japan. 21.3% are dehydrating facilities for polluted sludge, 45.1% are breaking-up facilities for wood-wastes or debris and 7.9% are other incineration facilities. (Figure 2-37).

### C. Changes to the number of permits given to new facilities for disposal of industrial wastes

## (incineration facilities and final disposal sites)

The number of permits given to new facilities for disposal of industrial wastes, both for incineration facilities and final disposal sites have sharply decreased, when compared with the years before revision of the Wastes Management Law in Year 2000. (Figure 2-38, 2-39).

## (2) Wide-area movement of wastes in the greater metropolises

In such megalopolis as the Tokyo metropolitan district, it is becoming difficult to secure intermediate processing fa-

Figure 2-35 Changes to numbers using the different methods of night soil treatment

Source: Ministry of the Environment

systems.

390,000 kiloliters were discharged into the sea, about 1.5% of the total planned disposition in Year 2006, and this figure has slightly decreased year by year. Disposal by discharge into the sea was prohibited in February 2007.

cilities such as incineration furnaces and final disposal sites, this is caused by the upgrading of land-use and environmental problems. Therefore, as it is not easy to process wastes in the local area, most of the municipal wastes and industrial wastes are transported across prefectural and city governmental borders to other areas for disposal.

In fiscal 2006, out of all municipal wastes generated from one Metropolis and six prefectures in the Tokyo metropolitan district, 1,780,000 tons were sent for final disposal, of these 230,000 tons were transported to an area other than where they originated, 190,000 tons - about 80% of the latter - were sent for final disposal to other areas outside the Tokyo metropolitan district. The final disposal amount of municipal wastes transported from the nationwide municipalities to prefectures outside their boundaries was 350,000 tons, the Tokyo metropolitan district accounts for a little over 60% of these.

In fiscal 2006, the amount of industrial wastes transported for the purpose of intermediate processing or final disposal from the Tokyo Metropolitan district to an area other than where they originated was 14,960,000 tons, 7,700,000 tons of these – which accounts for a little over 50% - were transported from the Tokyo metropolis, and of these 2,490,000 tons flowed-out from the Tokyo metropolitan district to other areas. (Figure 2-40).

It is worthy of note that as the amounts transported from the Tokyo metropolis to Saitama, Chiba and Kanagawa prefectures for intermediate processing are noticeably large, and the amounts transported for final disposal from Saitama and Kanagawa prefectures to other prefectures are also distinctly large, it is presumed that industrial wastes transported from Tokyo metropolis to outside are, after being sent